Peterbilt Medium Duty Trucks Operator's Manual after 1-07

Engine Maintenance
Fuel System
Specification: Use only Diesel Fuel, Grade 2-D, as recommended
by engine manufacturers. If you need further information
on Grade 2-D fuel specifications, consult the Engine
Operation Manual in the glove compartment.
WARNING! Diesel fuel in the presence of an ignition
source (such as a cigarette) could cause an
explosion. You could be seriously injured. A
mixture of gasoline or alcohol with diesel fuel
increases this risk of explosion.
CAUTION: If anyone ever pours gasoline into
your fuel tank, drain the entire system. Otherwise,
the pump and engine will be damaged.
Don't try to dilute the gasoline by adding diesel
fuel (see Warning above).
Preventive Maintenance
Please follow these recommendations when you are changing
your fuel filters or strainer elements. Your vehicle's engine
will run better and last longer if you do. See the engine manufacturer's
recommendations for proper water and micron
requirements.
Installing Fuel Filters
When removing filters, cover any electrical equipment and
wiring that might get soaked with fuel. Diesel fuel may permanently
damage electrical insulation.
When installing spin–on (throwaway) filters:
1. Prefill filter with fuel.
2. Moisten gasket with diesel fuel.
3. Hand tighten them only 1/2 to 2/3 turn after gasket contact.
Mechanical tightening of these filters may distort or
crack the filter head.
• When replacing a fuel filter element, do not use a substitute.
Install only filter elements designed for fuel filtration.
First clean and inspect the shell. Then insert the new
element and fill the container at least 2/3 full of clean fuel
before installing the shell
– 140 – Y53-6008 Medium Duty (R10/06)